$ git clone -n https://src.fedoraproject.org/rpms/libunicode.git /var/lib/mock/f45-build-17165-496/root/chroot_tmpdir/scmroot/libunicode
Cloning into '/var/lib/mock/f45-build-17165-496/root/chroot_tmpdir/scmroot/libunicode'...
$ git fetch origin 3d896e68b07223c196f8b11e90192b3765751e1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libunicode
 * [new ref]         3d896e68b07223c196f8b11e90192b3765751e1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d896e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild