$ git clone -n https://src.fedoraproject.org/rpms/rust-signature1.git /var/lib/mock/f41-build-747068-13360/root/chroot_tmpdir/scmroot/rust-signature1
Cloning into '/var/lib/mock/f41-build-747068-13360/root/chroot_tmpdir/scmroot/rust-signature1'...
$ git fetch origin 9a44b93036f59a14661f0e474d120b44fbbec579:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-signature1
 * [new ref]         9a44b93036f59a14661f0e474d120b44fbbec579 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a44b93 compat package no longer needed