$ git clone -n https://src.fedoraproject.org/rpms/gh.git /var/lib/mock/f38-build-720770-97918/root/chroot_tmpdir/scmroot/gh
Cloning into '/var/lib/mock/f38-build-720770-97918/root/chroot_tmpdir/scmroot/gh'...
$ git fetch origin db379bff09e9af8b805dcf7d10d1c1e814d4747e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gh
 * [new ref]         db379bff09e9af8b805dcf7d10d1c1e814d4747e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db379bf Update to 2.30.0 - Closes rhbz#2211264