$ git clone -n https://src.fedoraproject.org/rpms/prosody.git /var/lib/mock/f40-build-780140-130690/root/chroot_tmpdir/scmroot/prosody
Cloning into '/var/lib/mock/f40-build-780140-130690/root/chroot_tmpdir/scmroot/prosody'...
$ git fetch origin f4c355290a9e6be0e1b23985a270680e2891b642:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prosody
 * [new ref]         f4c355290a9e6be0e1b23985a270680e2891b642 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4c3552 Rebuild for ICU 74