$ git clone -n https://src.fedoraproject.org/rpms/tcl-tclvfs.git /var/lib/mock/f42-build-3486999-45834/root/chroot_tmpdir/scmroot/tcl-tclvfs
Cloning into '/var/lib/mock/f42-build-3486999-45834/root/chroot_tmpdir/scmroot/tcl-tclvfs'...
$ git fetch origin b7680c7ab5eefcb4465ed0974d171f7ba71e7438:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcl-tclvfs
 * [new ref]         b7680c7ab5eefcb4465ed0974d171f7ba71e7438 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7680c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild