$ git clone -n https://src.fedoraproject.org/rpms/gh.git /var/lib/mock/f39-build-1811164-41830/root/chroot_tmpdir/scmroot/gh
Cloning into '/var/lib/mock/f39-build-1811164-41830/root/chroot_tmpdir/scmroot/gh'...
$ git fetch origin 20b652ec2154d8bfdb5387da0b43b035e483f2f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gh
 * [new ref]         20b652ec2154d8bfdb5387da0b43b035e483f2f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20b652e Update to 2.39.1 - Closes rhbz#2249773 rhbz#2248270