$ git clone -n https://src.fedoraproject.org/rpms/kde-gtk-config.git /var/lib/mock/f41-build-851994-166178/root/chroot_tmpdir/scmroot/kde-gtk-config
Cloning into '/var/lib/mock/f41-build-851994-166178/root/chroot_tmpdir/scmroot/kde-gtk-config'...
$ git fetch origin 9a0cb4d4bb4f9677dafe74ae6e554d869d2fac34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kde-gtk-config
 * [new ref]         9a0cb4d4bb4f9677dafe74ae6e554d869d2fac34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a0cb4d 6.1.90