$ git clone -n https://src.fedoraproject.org/rpms/rust-codemap.git /var/lib/mock/f45-build-40856-776/root/chroot_tmpdir/scmroot/rust-codemap
Cloning into '/var/lib/mock/f45-build-40856-776/root/chroot_tmpdir/scmroot/rust-codemap'...
$ git fetch origin 5c1ae93501da90d0240c760027f7fa8b75bb1e67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-codemap
 * [new ref]         5c1ae93501da90d0240c760027f7fa8b75bb1e67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c1ae93 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild