$ git clone -n https://src.fedoraproject.org/rpms/rep-gtk.git /var/lib/mock/f40-build-2638377-66296/root/chroot_tmpdir/scmroot/rep-gtk
Cloning into '/var/lib/mock/f40-build-2638377-66296/root/chroot_tmpdir/scmroot/rep-gtk'...
$ git fetch origin c39c3401f65b57e805f01ec97a1025065462d758:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rep-gtk
 * [new ref]         c39c3401f65b57e805f01ec97a1025065462d758 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c39c340 Fix various functions related to gcc14, fixes rhbz#2256944, rhbz#2261650