$ git clone -n https://src.fedoraproject.org/rpms/rust-pastey.git /var/lib/mock/f45-build-43719-805/root/chroot_tmpdir/scmroot/rust-pastey
Cloning into '/var/lib/mock/f45-build-43719-805/root/chroot_tmpdir/scmroot/rust-pastey'...
$ git fetch origin 3bb192c6d43510e105c2a4667489ae2a02463ac8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pastey
 * [new ref]         3bb192c6d43510e105c2a4667489ae2a02463ac8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bb192c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild