$ git clone -n https://src.fedoraproject.org/rpms/rust-semver.git /var/lib/mock/f45-build-44754-816/root/chroot_tmpdir/scmroot/rust-semver
Cloning into '/var/lib/mock/f45-build-44754-816/root/chroot_tmpdir/scmroot/rust-semver'...
$ git fetch origin c2a0d584e1d140b5a92192274bcd250f87b964f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-semver
 * [new ref]         c2a0d584e1d140b5a92192274bcd250f87b964f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2a0d58 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild