$ git clone -n https://src.fedoraproject.org/rpms/rust-cap.git /var/lib/mock/f41-build-side-1-2934439-35233/root/chroot_tmpdir/scmroot/rust-cap
Cloning into '/var/lib/mock/f41-build-side-1-2934439-35233/root/chroot_tmpdir/scmroot/rust-cap'...
$ git fetch origin dc32e301d7d97425604827c9dc2dba0603c983cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cap
 * [new ref]         dc32e301d7d97425604827c9dc2dba0603c983cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc32e30 unused leaf package for more than two release cycles