$ git clone -n https://src.fedoraproject.org/rpms/rust-per-thread-mutex.git /var/lib/mock/f45-build-43790-805/root/chroot_tmpdir/scmroot/rust-per-thread-mutex
Cloning into '/var/lib/mock/f45-build-43790-805/root/chroot_tmpdir/scmroot/rust-per-thread-mutex'...
$ git fetch origin 886c5af97361fba72b748a3c7569da1def395680:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-per-thread-mutex
 * [new ref]         886c5af97361fba72b748a3c7569da1def395680 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 886c5af Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild