$ git clone -n https://src.fedoraproject.org/rpms/libXtst.git /var/lib/mock/f45-build-15793-479/root/chroot_tmpdir/scmroot/libXtst
Cloning into '/var/lib/mock/f45-build-15793-479/root/chroot_tmpdir/scmroot/libXtst'...
$ git fetch origin 18e4acaf15db4573f8ce5051536386cda9984cef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXtst
 * [new ref]         18e4acaf15db4573f8ce5051536386cda9984cef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18e4aca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild