$ git clone -n https://src.fedoraproject.org/rpms/rust-git-absorb.git /var/lib/mock/f41-build-810552-146776/root/chroot_tmpdir/scmroot/rust-git-absorb
Cloning into '/var/lib/mock/f41-build-810552-146776/root/chroot_tmpdir/scmroot/rust-git-absorb'...
$ git fetch origin 8c7dcb64af7d7390ec4c8894533a3c3f68c27884:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git-absorb
 * [new ref]         8c7dcb64af7d7390ec4c8894533a3c3f68c27884 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c7dcb6 Update to version 0.6.13; Fixes RHBZ#2273249