$ git clone -n https://src.fedoraproject.org/rpms/rust-libcramjam.git /var/lib/mock/f45-build-42873-797/root/chroot_tmpdir/scmroot/rust-libcramjam
Cloning into '/var/lib/mock/f45-build-42873-797/root/chroot_tmpdir/scmroot/rust-libcramjam'...
$ git fetch origin ac5e389df6f489cd4e8277c42ffbf56f4b265487:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcramjam
 * [new ref]         ac5e389df6f489cd4e8277c42ffbf56f4b265487 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac5e389 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild