$ git clone -n https://src.fedoraproject.org/rpms/massif-visualizer.git /var/lib/mock/f42-build-863750-171737/root/chroot_tmpdir/scmroot/massif-visualizer
Cloning into '/var/lib/mock/f42-build-863750-171737/root/chroot_tmpdir/scmroot/massif-visualizer'...
$ git fetch origin b5ffc1bef75bc714a60d2d6cb96f2c0851c2e27c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/massif-visualizer
 * [new ref]         b5ffc1bef75bc714a60d2d6cb96f2c0851c2e27c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5ffc1b 24.12.0