$ git clone -n https://src.fedoraproject.org/rpms/rust-devicemapper.git /var/lib/mock/f45-build-41257-780/root/chroot_tmpdir/scmroot/rust-devicemapper
Cloning into '/var/lib/mock/f45-build-41257-780/root/chroot_tmpdir/scmroot/rust-devicemapper'...
$ git fetch origin 1d1c8e6c5c54f4dd0c71b2d60b7146beaa73773a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-devicemapper
 * [new ref]         1d1c8e6c5c54f4dd0c71b2d60b7146beaa73773a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d1c8e6 Update to version 0.34.8