$ git clone -n https://src.fedoraproject.org/rpms/rust-bcrypt.git /var/lib/mock/f45-build-40470-772/root/chroot_tmpdir/scmroot/rust-bcrypt
Cloning into '/var/lib/mock/f45-build-40470-772/root/chroot_tmpdir/scmroot/rust-bcrypt'...
$ git fetch origin 072a7e953fa069b3499acdd57f0a116565804d50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bcrypt
 * [new ref]         072a7e953fa069b3499acdd57f0a116565804d50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 072a7e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild